Siemens QPM2102D IAQ Duct Sensor CO2 and VOC with Display, 0 to 10V

Siemens QPM2102D IAQ Duct Sensor CO2 and VOC with Display, 0 to 10V. Siemens QPM Series Indoor Air Quality Duct Sensors are made to optimize room comfort. Various models measure CO2, temperature, relative humidity and volative organic compounds, or a combination thereof.